Knob attachment



(No'ModeL) C. MARSHALL.

KNOB ATTACHMENT. No. 473,262. Patented Apr. 19,1892.

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NITED STATES CHARLES MARSHALL, OF CAMDEN, NEW JERSEY.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 473,262, dated April 19, 1892. Application filed November 25, 1891. Serial No. 413,038- (No model.)

T0 at whom it may concern.-

Be it known that 1, CHARLES MARSHALL, a citizen of the United States, residing at Gamden, in the county of Camden and State of New Jersey, have invented a new and useful Improvement in Locks, of which the following is a specification.

The object of my invention is to retain the knob of a lock on the spindle thereof without the usual screw which passes through the knob-shank into the knob-spindle.

The invention consists in the combination, in a lock, of a knob-shank provided with a transverse journal-bearin g formed in its outer surface, and a longitudinal slot communicating with said journal-bearing and the shanksocket, and a T-shaped connecting-latch composed of a journal, which turns in the bearing of the shank, and a latch bar or end fitted to swing loosely and disengaged in the longitudinal slot and shank-socket or be held in engagement with the rose-plate by the knobspindle.

On reference to the accompanying sheet of drawings, making part of this specification, Figure 1 is a vertical and transverse section of the door to which the lock is fixed, roseplates, latch-spindles, and knobs, and the T- shaped connecting-latches which engage the knobs with the rose-plates. Fig. 2 is an inside view of a rose-plate and an end view of the knob-spindle and a connecting-latch. Fig. 3 is a longitudinal and transverse section of the knob-shank, rose-plate, connecting-latch, and knob-spindle of one side, the knob-shank longitudinal slot being shown in heavy black. Fig.4. is a perspective view of the connectinglatch. Fig. 5 is a perspective view of the end of the knob-shank and connecting-latch; and Fig. 6 is an end view of the knob-shank, showing the connecting-latch swinging loosely or disconnected in its socket, vibrating with its journal.

Similar letters refer to similar parts in the several views.

A is the door; B, the lock latch-spindle, in this instance made square; 0 D, the roseplates fixed to the door, and E F the lockknobs, the shanksaof which fit over the ends of the spindle B and extend into the sockets b of the rose-plates. Each knob-shank a has a transverse journal-bearing 0 formed in its surface suitably near its end and alongitudinal slot cl, communicating with said journalbearing and shank-socket, which extends to the 'end of the shank. A T-shaped connect ing-latch G, composed of a journal H, which turns in the bearing a, and a latch extension or end f, which is fitted to swing loosely and disengaged in the longitudinal slot (1 and shank-socket e, is adapted to engage with the inner side of the rose-plate G, in which position it is held by the knob-spindle B, which fills the knob-shank socket and holds the latch end f in contact with the rose-plate in a horizontal position, Fig. 1.

To put my invention in practice, first screw one rose-plate O on the door A and pass the shank a of its respective knob E into the roseplate socket at, taking care to have the journal H of the connecting-latch G horizontal and uppermost and its latch end f swinging loosely and disengaged in the slot d and shanksocket e, Figs. 5 and 6. The knob-shank a, fitting in the rose-socket b, the journal H is restrained from jumping out of its bearing 0. Next give the knob E and its shank a onehalf turn, by which the journal H is turned undermost, its latch end f dropped into a horizontal position, and its catch engaged with the inner edge of the rose-plate spindle-opening g, Fig. 3. The spindle B is subsequently slipped from the opposite side through the door, lock, and rose-plate G into the socket e of the knob-shank and above the latch end f, which it holds in contact with the rose-plate in every position assumed by the knob, which has a perfectly-free rotary motion. The other knob F can be similarly fixed to the rose-plate D before screwing on the door. The end-of the connecting-latch f extending beyond the end of the knob-shank a and the rose-plate, provision is made for its rotation with its knob and spindle by cutting away the material of the door A, as shown by the angular indenture h, Fig. 1.

To remove the knobs E F from the latchspindle B, turn them until the respective parts assume the relative positions shown in Fig. 1, the connecting-latches f uppermost, and unscrew the rose-plates O D. On drawing the rose-plates and knobs from the spindle B the connecting-latches fwill turn and drop vertically into the knob-sockets, and thereby disconnect the parts, for, as shown and described, they are the only means of holding the knobs 011 the spindle.

I claim- The combination, in a lock, of a knob and shank provided with a transverse journalbearing, and a longitudinal slot communicating with said bearing and the shank-socket, and a T-shaped Vibrating connecting latch composed of a journal Which turns in said transverse bearing, and a latch end which is adapted to swing loosely and disengaged in the longitudinal slot and shank-socket or be held in engagement with the lock rose-plate by the knob-spindle for securing the knob on 15 its spindle, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES MARSHALL. lVitnesses:

FRANCIS D. PASTORIUS, MARTIN V. BERGEN. 

